[tree-ssa][ GC, Virtual operands, and GCing between passes

[law@redhat.com]

In message <1071236019.14001.14.camel@p4>, Andrew MacLeod writes:
 >It worked before because its a variable sized array at the end of the
 >varray structure, and doesnt have to have its elements marked.
 >so it would be sized as 
 >
 >SIZEOF VARRAY_HDR + sizeof (tree *) * num_elements
 >
 >and  the head of the varray is marked, and everything is wonderful.
 >
 >I am using exactly the same representation, except Im trying to
 >dynamically allocate the array insead of having the overhead of the
 >varray structure.
Ahhhh.  OK.


jeff